Editor’s Note: Biological anthropologist Helen Fisher is a research professor at the Center for Human Evolution Studies at Rutgers University, as well as Chief Scientific Advisor to the dating website Chemistry.com. Her new book, Why Him? Why Her?: Finding Real Love by Understanding Your Personality Type, explores how our body chemistry determines whom we love.

We asked Helen Fisher to characterize public figures into one of the four romantic personality types that is referred to in her book. For a more in-depth explanation of the meaning of each personality type, click here. To find out your personality type, take Dr. Fisher’s test by clicking here.

Explorer (artistic, optimistic and energetic):
Barack Obama
John F. Kennedy
Angelina Jolie

Builder (cautious, calm and orderly):
Tiger Woods
Colin Powell
George Washington

Director (rational, logical and emotionally contained):
Albert Einstein
Bill Gates
Hillary Clinton

Negotiator (intuitive, compassionate and nurturing):
Bill Clinton
Oprah Winfrey
Carla Bruni-Sarkozy